}

    @Override
    public int hashCode() {
      return Sets.hashCodeImpl(this);
    }
  }

  /**
   * Returns a {@link Converter} that converts values using {@link BiMap#get bimap.get()}, and whose
   * inverse view converts values using {@link BiMap#inverse bimap.inverse()}{@code .get()}.
   *
   * <p>To use a plain {@link Map} as a {@link Function}, see {@link